A U.S. envoy on North Korea is to visit South Korea, officials said on Wednesday, as Washington and Pyongyang struggle to find a breakthrough in their stalled talks aimed at ending the North’s nuclear program.

The European Union said on Thursday that pressure from the Tanzanian government on its ambassador forced his departure and return to Brussels, as deteriorating rights and freedoms in the East African nation come under fire from western donors.

European banks and firms who engage in a special European Union initiative to protect trade with Iran will be at risk from newly reimposed U.S. sanctions, the U.S. special envoy for Iran warned on Thursday.

The U.N. envoy for Libya hopes another attempt to hold an election will take place by June after he scrapped a December plan, but said Libyans should first use a national conference in early 2019 to decide on the poll’s format.

U.S. special envoy for peace in Afghanistan, Zalmay Khalilzad, will visit Afghanistan, Pakistan, the United Arab Emirates and Qatar from Nov. 8 to 20 to push for peace negotiations with the Afghan Taliban, the State Department said on Thursday.

The United States is determined to push Iranian oil exports to zero, U.S. Special Representative Brian Hook said on Wednesday, through a ‘calibrated’ approach using maximum economic pressure without lifting oil prices.